<template>
  <div class="cmt-container">
    <h3>发表评论</h3>
    <hr />
    <textarea maxlength="120" placeholder="请输入要BB的内容（最多吐槽120字）" v-model="msg"></textarea>
    <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>
    <div class="cmt-list">
      <div class="cmt-item" v-for="(item,i) in commentsList" :key="i">
        <div
          class="cmt-title"
        >第{{i+1}}楼&nbsp;&nbsp;用户:{{item.user_name}}&nbsp;&nbsp;发表时间:{{item.add_time | dateFormat}}</div>
        <div class="cmt-body">{{item.content==="undefined" ? "此用户很懒,没有留下任何足迹." : item.content}}</div>
      </div>
    </div>
    <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
  </div>
</template>
<script>
import { Toast } from "mint-ui";
export default {
  data() {
    return {
      msg: "",
      pageindex: 1,
      commentsList: []
    };
  },
  created() {
    this.getComments();
  },
  methods: {
    getComments() {
      this.axios
        .get("api/getcomments/" + this.id + "?pageindex=" + this.pageindex)
        .then(response => {
          if (response.data.status === 0) {
            this.commentsList = this.commentsList.concat(response.data.message);
          } else {
            Toast("获取评论列表失败");
          }
        });
    },
    getMore() {
      this.pageindex++;
      this.getComments();
    },
    postComment() {
      if (this.msg.trim().length === 0) {
        return Toast("評論內容不能為空");
      }
      this.axios
        .post("api/postcomment/" + this.id, { content: this.msg.trim() })
        .then(response => {
          if (response.data.status === 0) {
              this.commentsList.unshift({
                  user_name:"匿名用戶",
                  add_time:new Date(),
                  content:this.msg.trim()
              })
              this.msg = '';
          } else {
            Toast("發表評論失敗");
          }
        });
    }
  },
  props: ["id"]
};
</script>
<style lang="scss" scoped>
.cmt-container {
  h3 {
    font-size: 18px;
  }
  textarea {
    font-size: 14px;
    height: 85px;
    margin: 0;
  }
  .cmt-list {
    margin: 5px 0;
    .cmt-item {
      font-size: 13px;
      .cmt-title {
        line-height: 30px;
        background-color: #ccc;
      }
      .cmt-body {
        line-height: 35px;
        text-indent: 2em;
      }
    }
  }
}
</style>